[INFO] cloning repository https://github.com/kaitokido/logchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kaitokido/logchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaitokido%2Flogchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaitokido%2Flogchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28e4f425e590db586945599a56764fac4b9e4c28
[INFO] testing kaitokido/logchain against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaitokido%2Flogchain" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kaitokido/logchain on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kaitokido/logchain
[INFO] finished tweaking git repo https://github.com/kaitokido/logchain
[INFO] tweaked toml for git repo https://github.com/kaitokido/logchain written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/kaitokido/logchain already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b53f4cfe3c42285128426af526b7d9be551cf63abc50ff794745b9de2237e20
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3b53f4cfe3c42285128426af526b7d9be551cf63abc50ff794745b9de2237e20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b53f4cfe3c42285128426af526b7d9be551cf63abc50ff794745b9de2237e20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b53f4cfe3c42285128426af526b7d9be551cf63abc50ff794745b9de2237e20", kill_on_drop: false }`
[INFO] [stdout] 3b53f4cfe3c42285128426af526b7d9be551cf63abc50ff794745b9de2237e20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a2ef8a57dc4defa81fab6096d3330a33675453d760630e89460508b0850bcf9c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a2ef8a57dc4defa81fab6096d3330a33675453d760630e89460508b0850bcf9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling blake2 v0.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling block_log v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `chain` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |         let previous_index = &chain.last().unwrap().index;
[INFO] [stdout]    |                               ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 97 |         chain.push(create_block(
[INFO] [stdout]    |         ^^^^^ mutable borrow occurs here
[INFO] [stdout] 98 |             *previous_index,
[INFO] [stdout]    |             --------------- immutable borrow later used here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.13s
[INFO] running `Command { std: "docker" "inspect" "a2ef8a57dc4defa81fab6096d3330a33675453d760630e89460508b0850bcf9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2ef8a57dc4defa81fab6096d3330a33675453d760630e89460508b0850bcf9c", kill_on_drop: false }`
[INFO] [stdout] a2ef8a57dc4defa81fab6096d3330a33675453d760630e89460508b0850bcf9c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95cc1b99fbc59ca7d5c77ee218a14e616dd11c3ee09a40e524611739ec8fe1c5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "95cc1b99fbc59ca7d5c77ee218a14e616dd11c3ee09a40e524611739ec8fe1c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling block_log v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: cannot borrow `chain` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/main.rs:97:9
[INFO] [stdout]    |
[INFO] [stdout] 94 |         let previous_index = &chain.last().unwrap().index;
[INFO] [stdout]    |                               ----- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 97 |         chain.push(create_block(
[INFO] [stdout]    |         ^^^^^ mutable borrow occurs here
[INFO] [stdout] 98 |             *previous_index,
[INFO] [stdout]    |             --------------- immutable borrow later used here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.91s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "95cc1b99fbc59ca7d5c77ee218a14e616dd11c3ee09a40e524611739ec8fe1c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95cc1b99fbc59ca7d5c77ee218a14e616dd11c3ee09a40e524611739ec8fe1c5", kill_on_drop: false }`
[INFO] [stdout] 95cc1b99fbc59ca7d5c77ee218a14e616dd11c3ee09a40e524611739ec8fe1c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 601e0cf50d4e6c3cda6811c7b484f6b29766124d9009d5dd74b4e9806d7cc1e0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "601e0cf50d4e6c3cda6811c7b484f6b29766124d9009d5dd74b4e9806d7cc1e0", kill_on_drop: false }`
[INFO] [stderr] warning: cannot borrow `chain` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/main.rs:97:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |         let previous_index = &chain.last().unwrap().index;
[INFO] [stderr]    |                               ----- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 97 |         chain.push(create_block(
[INFO] [stderr]    |         ^^^^^ mutable borrow occurs here
[INFO] [stderr] 98 |             *previous_index,
[INFO] [stderr]    |             --------------- immutable borrow later used here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/block_log-6f628d161d674581
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "601e0cf50d4e6c3cda6811c7b484f6b29766124d9009d5dd74b4e9806d7cc1e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "601e0cf50d4e6c3cda6811c7b484f6b29766124d9009d5dd74b4e9806d7cc1e0", kill_on_drop: false }`
[INFO] [stdout] 601e0cf50d4e6c3cda6811c7b484f6b29766124d9009d5dd74b4e9806d7cc1e0